The tweet was followed by a SI.com report saying Hernandez is likely to be arrested, although the nature of potential charges remain unclear.

Aaron Hernandez (AP Photo)

Thursday afternoon, the Boston Herald cited law enforcement sources as saying there was no current warrant for Hernandez's arrest.

Police have another warrant to search Hernandez's home, according to ABC News. It is based on evidence that "he destroyed his home security system,'' which included video surveillance. Sources also told ABC a cell phone used by Hernandez was smashed before being turned over to investigators.

Authorities on Thursday returned to the industrial park where the body of 27-year-old Odin Lloyd had been found on Monday, Boston’s WFXT-TV reported on its website. The station, citing a law enforcement official, also reported that Hernandez "appears to be directly tied" to the slaying, and that Hernandez, Lloyd and two other men had left a Boston bar together in a car driven by Hernandez on the night Lloyd was killed.

Forensic evidence places a vehicle driven by Hernandez at one of the crime scenes, the station reported.

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Law enforcement officials on Thursday also were trying to find out why a team of cleaners was hired to scrub his mansion this week.

Hernandez has been dogged by off-field issues dating at least to his time at the University of Florida, multiple NFL and law enforcement sources have told Sports Illustrated.

Projected as a first-round pick in the 2010 NFL Draft, Hernandez fell to the fourth round because of marijuana use while with the Gators, SI.com reported. He admitted to NFL teams at the Scouting Combine when he was a draft prospect, several NFL sources told the site.

Personnel sources from multiple NFL teams told SI that they had off-field concerns about Hernandez. In particular, the questions pertained to alleged gang activity of some of Hernandez's associates in his native Bristol, Conn. A law enforcement official familiar with Hernandez reiterated concerns about his circle of influence.

Combined, the marijuana use and gang concerns worried some NFL teams immensely.

"There were a lot of teams that had him off the board," an NFL personnel executive told SI.com.

Meanwhile, media members hounded Hernandez at every turn. His SUV was tailed on the ground and by at least three helicopters while en route to Patriots headquarters in Foxborough, Mass.

According to the Boston Globe, the SUV left Patriots headquarters shortly after noon ET. When Hernandez stopped his SUV for gas, media members swarmed him. He had no comment.

Helicopters lost sight of the vehicle when it entered a garage about an hour later.

Meanwhile, a television news report linked Hernandez and Lloyd to a Boston bar on Monday. They and two other men left together in a vehicle driven by Hernandez, according to WFXT, a station based in Dedham, Mass. The report said Lloyd sent a text message to a friend that confirms he was with Hernandez. It also says a vehicle owned by Hernandez was at a location police are treating as a crime scene.

Police also were seeking part of a car mirror that was believed to have broken off between Dorcester and North Attleborough, the Globe reported. A search was conducted Wednesday, and law enforcement officials were seeking public help in location it. There was no immediate information about how the broken car part was connected to the case.

"It remains an active and fluid investigation," Yasmina Serdarevic, a representative of the Bristol district attorney, told the Globe.

Police also were searching the area near Lloyd’s Dorchester neighborhood for surveillance video, the Herald reported.

The mirror might be from a 2013 Chevrolet Suburban rented in Hernandez's name, according to a Fox news report. Police are also seeking a silver Chrysler with Rhode Island registration that might be connected to the homicide investigation.

Media camped out Thursday at Hernandez's home, on the Rhode Island state line not far from the Patriots' stadium in Foxborough.

Patriots spokesman Stacey James said the team had no comment on why Hernandez was there. He said earlier that the team did not anticipate commenting publicly during the police investigation.

Lloyd was a player for the Boston Bandits, a semi-pro team in the New England Football League. His family said he had a connection to Hernandez, according to the Associated Press.

Hernandez attorney Michael Fee acknowledged media reports about the state police search of Hernandez's home as part of an investigation but said he and the player wouldn't have any comment on it.